The viscosity 7 of a gas depends on the mass, the effective diameter andthe mean speed of the molecules. Use dimensional analysis to find 7 as afunction of these variables. Hence estimate the diameter of the methane(CH.) molecule given that n has values of 2.0 x 10-S kg m-'s=' forhelium and 1.1 x 10-$ kg m-'s-' for methane at room temperature, andthat the diameter of the helium atom is 2.1 x 10-10 m. [Relative atomicmasses for C and He are 12 and 4 respectively.]

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Answered: The viscosity 7 of a gas depends on the…

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